formfeeds

Started by John Larkin in sci.electronics.design3 years ago 13 replies

I have lots of old program sources and listings that have embedded formfeed characters to page the listings. But modern printers seem to ignore...

I have lots of old program sources and listings that have embedded formfeed characters to page the listings. But modern printers seem to ignore them, maybe print a little box but not eject the rest of the page. Does anyone know of a way to print properly paged listings on a networked digital copier or laser printer? Crimson Editor can't do this. -- John Larkin Highland T...


Analog Devices ==> downhill

Started by John Larkin in sci.electronics.design10 years ago 30 replies

Wow, their support has gotten bad lately. The people you can contact don't know much about the parts, and the web site is half broken. --...

Wow, their support has gotten bad lately. The people you can contact don't know much about the parts, and the web site is half broken. -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers ...


CE compliance

Started by John Larkin in sci.electronics.design9 years ago 21 replies

https://dl.dropbox.com/u/53724080/CE_Compliant.JPG Presumably this thing passed EMI and low voltage, is lead-free, too. -- John...

https://dl.dropbox.com/u/53724080/CE_Compliant.JPG Presumably this thing passed EMI and low voltage, is lead-free, too. -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photo...


LED reference current source

Started by John Larkin in sci.electronics.design9 years ago 286 replies

Has anybody done this? https://dl.dropbox.com/u/53724080/Circuits/Isrc_LED.JPG -- John Larkin Highland Technology...

Has anybody done this? https://dl.dropbox.com/u/53724080/Circuits/Isrc_LED.JPG -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links V...


NEWS

Started by John Larkin in sci.electronics.design9 years ago 7 replies

http://dailycurrant.com/ -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at...

http://dailycurrant.com/ -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multic...


Danish Butter Cookies

Started by John Larkin in sci.electronics.design9 years ago 42 replies

The tins are great for keeping all of a project's stuff together on the workbench. -- John Larkin Highland Technology,...

The tins are great for keeping all of a project's stuff together on the workbench. -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links V...


Phil

Started by John Larkin in sci.electronics.design8 years ago 8 replies

https://dl.dropboxusercontent.com/u/53724080/Circuits/Amps/Compound_Fet.JPG -- John Larkin Highland Technology...

https://dl.dropboxusercontent.com/u/53724080/Circuits/Amps/Compound_Fet.JPG -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME anal...


coupled resonators

Started by John Larkin in sci.electronics.design7 years ago 17 replies

Cool visual patterns: https://dl.dropboxusercontent.com/u/53724080/Circuits/Oscillators/Coupled_Resonators.jpg The waveforms decay,...

Cool visual patterns: https://dl.dropboxusercontent.com/u/53724080/Circuits/Oscillators/Coupled_Resonators.jpg The waveforms decay, which must be some Spice setting. Ideal resonators wouldn't lose energy. Gear integration is much worse than trap. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology...


ot food

Started by John Larkin in sci.electronics.design7 years ago 2 replies

These are really good: http://www.amazon.com/Sour-Cherry-Preserve-sarantis-16oz/dp/B000LRIIU6/ref=pd_rhf_gw_p_img_2 Not sour at all. And...

These are really good: http://www.amazon.com/Sour-Cherry-Preserve-sarantis-16oz/dp/B000LRIIU6/ref=pd_rhf_gw_p_img_2 Not sour at all. And sticky. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


really fast buffers

Started by John Larkin in sci.electronics.design3 years ago 95 replies

I'm designing a test board for a laser controller. Incoming signals, fast 5 volt pulses, will need to get routed to scopes, counters, and some...

I'm designing a test board for a laser controller. Incoming signals, fast 5 volt pulses, will need to get routed to scopes, counters, and some other stuff. It will be kind a maze of connectors and traces and probably relays; it's hard to beat a relay as a test path switch. But life would be a lot better if I could fan out some of the signals at their input connector. I want a zero-delay, ze...


Micrel chip test

Started by Anonymous in sci.electronics.design2 months ago 17 replies

Lately we're doing some small 6-layer boards with breakaway tabs for fixturing. So there can be freebie little circuits that snap off. We...

Lately we're doing some small 6-layer boards with breakaway tabs for fixturing. So there can be freebie little circuits that snap off. We use the Micrel SY88022 laser driver in a few off-label applications, and we don't know enough about it, so I hung a test circuit on an upcoming board. https://www.dropbox.com/s/xu559d7y81n4q6g/T502_SY88.jpg?raw=1 This chip is similar to the Maxim...


Improved capacitance multiplier

Started by Phil Hobbs in sci.electronics.design11 years ago 29 replies

So, I had this application requiring really absurd amounts of ripple rejection--it's a piezo driver in a laser wavelength locker that (for...

So, I had this application requiring really absurd amounts of ripple rejection--it's a piezo driver in a laser wavelength locker that (for historical reasons) has to run off a fairly crappy dual isolated 48V DC-DC converter. The 48V has almost a half volt of ripple at 47 kHz, and the output noise needed to be in the nanovolts. As we've discussed here before, ordinary cap multipliers ar...


down?

Started by John Larkin in sci.electronics.design9 years ago 11 replies

Is http://www.linear-tech.com/ down? -- John Larkin Highland Technology Inc www.highlandtechnology.com ...

Is http://www.linear-tech.com/ down? -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, ...


2 oz copper

Started by John Larkin in sci.electronics.design8 years ago 15 replies

Is it reasonable to spec 2 oz copper on a pcb with 8/8 design rules? -- John Larkin Highland Technology...

Is it reasonable to spec 2 oz copper on a pcb with 8/8 design rules? -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog,...


EDN is vanishing

Started by John Larkin in sci.electronics.design10 years ago 20 replies

The current issue is 53 mils thick, according to my calipers. -- John Larkin, President Highland Technology...

The current issue is 53 mils thick, according to my calipers. -- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermoco...


some great pics

Started by John Larkin in sci.electronics.design10 years ago 60 replies

http://tinyurl.com/7yv4bw4 -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at...

http://tinyurl.com/7yv4bw4 -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer ...


great pics

Started by John Larkin in sci.electronics.design8 years ago 19 replies

http://nypost.com/2013/12/12/obamas-flirt-with-danish-prime-minister-is-a-disgrace/ -- John Larkin Highland...

http://nypost.com/2013/12/12/obamas-flirt-with-danish-prime-minister-is-a-disgrace/ -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links ...


BJT base current 1/f noise

Started by Phil Hobbs in sci.electronics.design4 years ago 87 replies

Is horrible. I'm just debugging a nice diode laser controller for one customer and getting ready to do another one for another (much better)...

Is horrible. I'm just debugging a nice diode laser controller for one customer and getting ready to do another one for another (much better) customer. It uses a ZXTP25020 PNP with a biggish degeneration resistor and two-pole bypassing of the base to get low noise at high frequency. Turns out the 1/f noise is atrocious. The total noise from 2 Hz on up is only a couple of PPM, but it sho...


See this Fast pulse circuit.

Started by amdx in sci.electronics.design2 years ago 3 replies

I ran across this thread that starts with, "Here is a simple pulse generator I have made for testing medium BW scopes' rise times. It...

I ran across this thread that starts with, "Here is a simple pulse generator I have made for testing medium BW scopes' rise times. It produces flat top signal with clean and fast rise and fall edges." He uses a MAX3949 Laser Driver to generate the signal. He started with 40 to 50 ps and got a little better each iteration. Also, has better connectors if you need them and some ot...


Maser Amplification

Started by Warren in sci.electronics.design4 years ago 11 replies

I was reading "The Idea Factory: Bell Labs and the Great Age of American Innovation" where I was reading about the development of the maser, laser...

I was reading "The Idea Factory: Bell Labs and the Great Age of American Innovation" where I was reading about the development of the maser, laser etc. I get the principle of generating a microwave signal out of a maser. What I don't get is how they used the maser to _amplify_ signals for Telstar (I assume for the downlink). So in high level terms, how does a maser get applied to amplification ...